A floating boring device for processing inner wall of motor casing

Abstract

The application discloses a kind of floating boring device for motor casing inner wall processing, belongs to floating boring field, including moving rod, the left side end of the moving rod is fixedly connected with mounting column, boring mechanism is arranged in the inside of the mounting column;The boring mechanism includes the installation shell slidingly connected in the inside of the mounting column, the inside top of the installation shell is fixedly connected with fixed cutter, the inside bottom end of the installation shell is movably connected with mobile cutter, the left side of the mounting column is fixedly connected with driving element.By setting linkage mechanism consisting of transverse plate, extruding block, connecting plate and limit plate controlled by driving element, the locking of mobile cutter can be automatically released, and the mobile cutter is moved to the preset size by using the inclined block, and then it is relocked after the driving element is withdrawn, the stepwise automatic adjustment of boring size is realized, manual tool changing is not needed during shutdown, and the processing efficiency and automation degree are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of floating boring, and more specifically, to a floating boring apparatus for machining the inner wall of an electric motor housing. Background Technology

[0002] As a critical structural component of a motor, the cylindricity, surface roughness, and dimensional accuracy of the motor housing directly affect the assembly quality and operational stability of the motor. Traditionally, the inner wall of a motor housing is machined using boring tools to finish the inner hole after casting or rough machining. However, due to the considerable length of the motor housing, chattering can easily occur when the boring bar extends into the deep hole, resulting in vibration marks on the machined surface and making it difficult to guarantee dimensional accuracy. Furthermore, different motor housing models have varying inner diameters, and traditional boring devices often require changing to different specifications of boring tools or adjusting the tool head, which is cumbersome and reduces machining efficiency.

[0003] Existing technology uses a fixed boring bar structure, which can achieve machining of the inner wall of the machine housing to a certain extent. However, it cannot automatically adjust the boring dimensions during the machining process and lacks effective support for the boring bar, which can easily cause tool deflection when machining deep holes.

[0004] To address this, a floating boring device for machining the inner wall of a motor housing is proposed. This device enables stepped automatic feed boring and provides multi-point adaptive support for the boring bar during machining, significantly improving machining accuracy and stability. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a floating boring device for machining the inner wall of a motor housing. By setting up a linkage mechanism consisting of a horizontal plate, an extrusion block, a connecting plate, and a limiting plate controlled by a drive component, the device can automatically release the lock on the moving tool and use the inclined block to push the moving tool to a preset size. Then, after the drive component retracts, it relocks, realizing the step-like automatic adjustment of the boring size. It eliminates the need for manual tool changing without stopping the machine, significantly improving machining efficiency and automation.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A floating boring device for machining the inner wall of an electric motor housing includes a moving rod, a mounting column fixedly connected to the left end of the moving rod, and a boring mechanism disposed inside the mounting column; The boring mechanism includes a mounting shell slidably connected inside the mounting column. A fixed blade is fixedly connected to the top of the inside of the mounting shell, and a movable blade is movably connected to the bottom of the inside of the mounting shell. A driving component is fixedly connected to the left side of the mounting column. The left side of the mounting shell is hollowed out, and a horizontal plate is slidably connected to the left side of the inside of the mounting shell.

[0008] Furthermore, the right side of the horizontal plate extends to the right to form a pressing block, and a limiting plate is slidably connected to the inside right side of the mounting shell. A connecting plate is fixedly connected between the pressing block and the limiting plate.

[0009] Furthermore, the limiting plate has a serration fixed on the side near the moving blade, the side of the moving blade has a serration groove corresponding to the position of the serration, the left side of the moving blade is fixedly connected to an inclined block, and the surface of the moving rod is provided with a limiting mechanism.

[0010] Furthermore, the rear side of the extrusion block extends rearward to form a first extension block, and a first spring in a naturally extended state is welded to the side of the first extension block.

[0011] Furthermore, the limiting mechanism includes a disc slidably connected to the surface of the moving rod, and an extension rod is fixedly connected to the side of the disc near the boring mechanism. Multiple spirally distributed sector blocks are fixedly connected to the surface of the extension rod, and the distance between adjacent sector blocks increases sequentially.

[0012] Furthermore, the surface of the movable rod is equidistantly distributed with multiple inner rings, the inner rings are fixedly connected to the surface of the movable rod, and the surface of the inner rings is rotatably connected with mounting rings.

[0013] Furthermore, a movable ring is slidably connected inside the mounting ring, the extension rod passes through the movable ring, a second extension block is fixedly connected inside the movable ring corresponding to the position of the sector block, and a second limiting block is fixedly connected to the surface of the movable ring.

[0014] Furthermore, a first limiting block is rotatably connected to the inner edge of the mounting ring, and a torsion spring reset member for connecting the first limiting block and the mounting ring is provided inside the end of the first limiting block, and the second limiting block is engaged inside the torsion spring reset member.

[0015] Furthermore, a third spring is welded to the right side of the moving ring, and a pop-out block is slidably connected to the inside of the inner ring extending into the inside of the moving rod. The end of the pop-out block is inclined, and a return spring is welded to the end of the pop-out block away from the inclined surface.

[0016] Furthermore, the length of the horizontal plate is equal to the length of the mounting shell, and the distance between adjacent sector blocks increases exponentially.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This solution, through the setting of a linkage mechanism consisting of a horizontal plate, an extrusion block, a connecting plate, and a limiting plate controlled by a drive component, can automatically unlock the moving tool and use the inclined block to push the moving tool to the preset size. Then, after the drive component retracts, it relocks, realizing the step-by-step automatic adjustment of the boring size. There is no need to stop the machine to manually change the tool, which significantly improves the processing efficiency and automation level.

[0018] This design incorporates multiple rotatable mounting rings on the moving rod. The fan-shaped blocks on the extending rod engage with the second extension blocks on the moving rings. When the boring device extends into the machine housing, the disc contacts the end face of the housing and pushes the extending rod to move relative to it. This causes the fan-shaped blocks to sequentially trigger the first limiting blocks within each mounting ring to rotate and extend, forming multi-point support for the moving rod. Because the spacing between the fan-shaped blocks increases exponentially, the support points are non-equidistant along the axial direction, which better conforms to the stress characteristics of a cantilever beam and effectively suppresses chatter during deep hole machining.

[0019] In this design, after the first limiting block is rotated and extended under the drive of the torsion spring reset component, its end contacts the inner wall of the housing. The rotation of the moving rod does not affect the support state of the first limiting block. At the same time, when the moving rod continues to move forward, the pop-out block in the inner ring can be automatically released under the action of the reset spring, so that the triggered mounting ring remains in its current position, while the moving rod continues to move forward. This achieves the hierarchical and gradual establishment of support points, adapting to the processing of housings of different lengths.

[0020] This solution has a compact structure, with all adjustment and support mechanisms integrated on the moving rod, without adding any additional external equipment. It is suitable for the retrofitting and upgrading of existing boring machines. At the same time, by changing the extension distance of the inclined block or the helix angle of the sector block, it can be easily adapted to motor housings of different specifications. It has strong versatility and good market application prospects. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the floating boring device of the present invention; Figure 2 This is a schematic diagram of the boring mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mounting shell of the present invention; Figure 4 This is a schematic diagram of the mounting ring structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the mounting ring of the present invention; Figure 6 This is a partial cross-sectional view of the mounting ring of the present invention; Figure 7 This is a schematic diagram of the inner ring structure of the present invention; Figure 8 This is a schematic diagram of the structure of the disk of the present invention.

[0022] Explanation of the labels in the diagram: 1. Moving rod; 11. Limiting groove; 12. Mounting post; 13. Limiting post; 2. Boring mechanism; 21. Mounting shell; 22. Fixed blade; 24. Horizontal plate; 241. Extrusion block; 242. First extension block; 243. First spring; 25. Moving blade; 26. Inclined block; 27. Limiting plate; 28. Second spring; 29. ​​Connecting plate; 3. Limiting mechanism; 31. Disc; 311. Insertion rod; 312. Fan-shaped block; 32. Mounting ring; 321. First limiting block; 322. Moving ring; 323. Second extension block; 324. Third spring; 325. Torsion spring reset component; 326. Second limiting block; 33. Inner ring; 331. Pop-out block; 332. Reset spring; 4. Driving component. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Please see Figures 1 to 8 A floating boring device for machining the inner wall of a motor housing includes a movable rod 1, a mounting column 12 fixedly connected to the left end of the movable rod 1, a boring mechanism 2 disposed inside the mounting column 12, and the right side of the movable rod 1 connected to an external drive motor. The rotation of the motor can drive the mounting column 12 and the boring mechanism 2 to rotate. During operation, the boring mechanism 2 is inserted into the inner wall of the motor housing to be machined, and the rotating boring mechanism 2 can perform precision boring on the inner wall of the housing.

[0024] like Figure 2 , Figure 4 , Figure 5As shown, the boring mechanism 2 includes a mounting shell 21 slidably connected inside the mounting column 12. The mounting shell 21 can be finely adjusted along the axial direction of the mounting column 12. A fixed cutter 22 is fixedly connected to the top of the interior of the mounting shell 21, and a movable cutter 25 is movably connected to the bottom of the interior of the mounting shell 21. By moving the movable cutter 25, the radial distance between the fixed cutter 22 and the movable cutter 25 can be changed, thereby controlling the boring diameter. A drive member 4 is fixedly connected to the left side of the mounting column 12. When it is necessary to adjust the boring size, the drive member 4 is activated, causing its output shaft to extend to the right. The left side of the mounting shell 21 is a hollow structure, and the output shaft of the drive member 4 extends into the interior of the mounting shell 21. A horizontal plate 24 is slidably connected to the left side of the interior of the mounting shell 21. When the output shaft of the drive member 4 moves to the right, it presses the horizontal plate 24, causing the horizontal plate 24 to move to the right inside the mounting shell 21. The length of the horizontal plate 24 is equal to the length of the mounting shell 21. Therefore, no matter what position the mounting shell 21 is in inside the mounting column 12, the drive member 4 can always press the horizontal plate 24.

[0025] The right side of the horizontal plate 24 extends to the right to form a pressing block 241. A limiting plate 27 is slidably connected to the inside right side of the mounting shell 21. A connecting plate 29 is fixedly connected between the pressing block 241 and the limiting plate 27. When the pressing block 241 moves to the right, the limiting plate 27 moves to the right synchronously through the connecting plate 29. The side of the limiting plate 27 near the moving blade 25 is machined with serrations. The side of the moving blade 25 is correspondingly provided with serrated grooves, forming a ratchet locking structure. When the limiting plate 27 moves to the right and disengages from the serrated groove of the moving blade 25, the moving blade 25 is unlocked and can move up and down inside the mounting shell 21.

[0026] The rear side of the extrusion block 241 extends rearward to form a first extension block 242. A first spring 243 in a naturally extended state is welded to the side of the first extension block 242. When the first extension block 242 moves to the right with the extrusion block 241, the first spring 243 is compressed and stores elastic potential energy. After the drive member 4 retracts, the first spring 243 is released, pushing the extrusion block 241 and the limiting plate 27 to the left to reset, so that the limiting plate 27 is once again engaged in the serrated groove of the moving blade 25 to achieve fixation.

[0027] A ramp block 26 is fixedly connected to the left side of the moving cutter 25. The upper surface of the ramp block 26 is an inclined surface that is lower on the left and higher on the right. By moving the ramp block 26, the inclined surface can extend beyond the top of the moving cutter 25 by different lengths. This extension length matches the distance that the moving cutter 25 needs to move. The longer the extension, the more to the right the contact point between the extrusion block 241 and the ramp block 26 will be when the drive member 4 pushes the extrusion block 241, and the greater the distance that the moving cutter 25 will move downward. During machining, step boring is required in sequence from small to large. When the small-size boring is completed, the drive member 4 extends, on the one hand releasing the locking of the limit plate 27 on the moving cutter 25, and on the other hand, when the extrusion block 241 moves to the right, it contacts the inclined surface of the ramp block 26, pushing the ramp block 26 downward, thereby driving the moving cutter 25 downward to the next preset size. After the drive member 4 retracts, the limit plate 27 re-locks into the new position of the moving cutter 25, completing one size switch. This process is repeated to achieve multi-level step automatic boring.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 As shown, a limiting mechanism 3 is provided on the surface of the moving rod 1. The limiting mechanism 3 includes a disc 31 slidably connected to the surface of the moving rod 1. When the device is placed inside the housing, the disc 31 first contacts the end face of the housing. When the device continues to move into the housing, the disc 31 is squeezed by the end face of the housing and slides to the right on the moving rod 1. An extension rod 311 is fixedly connected to the side of the disc 31 near the boring mechanism 2. When the disc 31 slides, it drives the extension rod 311 to move synchronously. Multiple spirally distributed sector blocks 312 are fixedly connected to the surface of the extension rod 311. The distance between adjacent sector blocks 312 increases sequentially in the direction of extension.

[0029] Multiple inner rings 33 are evenly distributed on the surface of the moving rod 1. The inner rings 33 are fixedly connected to the surface of the moving rod 1. Each inner ring 33 is rotatably connected to the outside of a mounting ring 32. A moving ring 322 is slidably connected inside the mounting ring 32 at the position corresponding to the insertion rod 311. The insertion rod 311 passes through the center hole of the moving ring 322. A second extension block 323 is fixedly connected inside the moving ring 322 at the position corresponding to the sector block 312. When the insertion rod 311 moves to the left, the sector block 312 contacts and presses against the second extension block 323 on each moving ring 322 in sequence, pushing the moving ring 322 to move to the right inside the mounting ring 32. A second limiting block 326 is fixedly connected to the surface of the moving ring 322.

[0030] A first limiting block 321 is rotatably connected to the inner edge of the mounting ring 32. A torsion spring reset member 325 is sleeved on the rotating shaft of the first limiting block 321. The torsion spring reset member 325 provides torque to rotate the first limiting block 321 outward. In the initial state, the second limiting block 326 is inserted into the groove of the torsion spring reset member 325, preventing it from rotating and keeping the first limiting block 321 inside the mounting ring 32. When the moving ring 322 moves to the right, it drives the second limiting block 326 to be pulled out of the torsion spring reset member 325. The torsion spring reset member 325 is released, driving the first limiting block 321 to rotate outward by 90°. Its end extends out of the mounting ring 32 and abuts against the inner wall of the housing. Since the spacing of the fan-shaped blocks 312 increases, when the device is inserted to a certain depth, only the mounting ring 32 at a specific position is triggered, and the triggering interval gradually increases, so that the distribution of support points matches the bending moment distribution of the cantilever beam, effectively suppressing vibration.

[0031] A third spring 324 is welded to the right side of the moving ring 322. When the moving ring 322 moves, the third spring 324 is compressed for subsequent reset. An ejector block 331 is slidably connected inside the inner ring 33. The end of the ejector block 331 is inclined and is pressed into the limiting groove 11 of the moving rod 1 by the reset spring 332, so that the inner ring 33 is fixed relative to the moving rod 1 when not triggered. When the mounting ring 32 is triggered, as the moving rod 1 continues to move forward, the inclined surface of the ejector block 331 interacts with the protrusion on the moving rod 1, causing the ejector block 331 to retract backward against the elastic force of the reset spring 332, releasing the inner ring 33. This allows the triggered mounting ring 32 to remain stationary relative to the moving rod 1, while the moving rod 1 can continue to move forward. This design ensures stable support of the support point throughout the entire processing.

[0032] After processing is completed, when the device is removed from the housing, each component automatically resets under the action of springs, ready for the next use.

[0033] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A floating boring device for machining the inner wall of an electric motor housing, comprising a moving rod (1), characterized in that: The left end of the moving rod (1) is fixedly connected to a mounting column (12), and a boring mechanism (2) is provided inside the mounting column (12). The boring mechanism (2) includes a mounting shell (21) slidably connected inside the mounting column (12). A fixed blade (22) is fixedly connected to the top inside the mounting shell (21). A movable blade (25) is movably connected to the bottom inside the mounting shell (21). A driving component (4) is fixedly connected to the left side of the mounting column (12). The left side of the mounting shell (21) is hollowed out. A horizontal plate (24) is slidably connected to the left side inside the mounting shell (21). The right side of the horizontal plate (24) extends to the right to form an extrusion block (241), and the right side of the inner side of the mounting shell (21) is slidably connected to a limiting plate (27). A connecting plate (29) is fixedly connected between the extrusion block (241) and the limiting plate (27).

2. The floating boring device for machining the inner wall of a motor housing according to claim 1, characterized in that: The limiting plate (27) has a saw tooth fixed on the side near the moving blade (25), and the side of the moving blade (25) has a saw tooth groove corresponding to the position of the saw tooth. The left side of the moving blade (25) is fixedly connected to an inclined block (26), and the surface of the moving rod (1) is provided with a limiting mechanism (3).

3. A floating boring device for machining the inner wall of a motor housing according to claim 2, characterized in that: The rear side of the compression block (241) extends rearward to form a first extension block (242), and a first spring (243) in a naturally extended state is welded to the side of the first extension block (242).

4. A floating boring device for machining the inner wall of a motor housing according to claim 3, characterized in that: The limiting mechanism (3) includes a disk (31) slidably connected to the surface of the moving rod (1). An extension rod (311) is fixedly connected to the side of the disk (31) near the boring mechanism (2). A plurality of spirally distributed sector blocks (312) are fixedly connected to the surface of the extension rod (311), and the distance between adjacent sector blocks (312) increases sequentially.

5. A floating boring device for machining the inner wall of a motor housing according to claim 4, characterized in that: The surface of the movable rod (1) is equidistantly distributed with multiple inner rings (33), the inner rings (33) are fixedly connected to the surface of the movable rod (1), and the surface of the inner rings (33) is rotatably connected with mounting rings (32).

6. A floating boring device for machining the inner wall of a motor housing according to claim 5, characterized in that: The mounting ring (32) is slidably connected to a movable ring (322), the extension rod (311) passes through the movable ring (322), the movable ring (322) is fixedly connected to a second extension block (323) at the position corresponding to the fan-shaped block (312), and the surface of the movable ring (322) is fixedly connected to a second limiting block (326).

7. A floating boring device for machining the inner wall of a motor housing according to claim 6, characterized in that: The inner edge of the mounting ring (32) is rotatably connected to a first limiting block (321). The end of the first limiting block (321) is provided with a torsion spring reset member (325) for connecting the first limiting block (321) and the mounting ring (32). The second limiting block (326) is inserted into the interior of the torsion spring reset member (325).

8. A floating boring device for machining the inner wall of a motor housing according to claim 7, characterized in that: A third spring (324) is welded to the right side of the moving ring (322). The inner ring (33) extends into the interior of the moving rod (1) and is slidably connected to a pop-out block (331). The end of the pop-out block (331) is inclined, and a return spring (332) is welded to the end of the pop-out block (331) away from the inclined surface.

9. A floating boring device for machining the inner wall of a motor housing according to claim 8, characterized in that: The length of the horizontal plate (24) is equal to the length of the mounting shell (21), and the distance between adjacent sector blocks (312) increases exponentially.

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